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Its skipping bad and the check engine light blank off and…

Customer Question
Its skipping bad and...

Its skipping bad and the check engine light blank off and on

Mechanic's Assistant: Does the light stay on, or does it blink?

At first it stayed on when I started driven it started blinking

Mechanic's Assistant: What is the model/year of your Mercury?

Its a1999 ford mercury grand marquis

Mechanic's Assistant: What year is your Grand Marquis?

1999

Mechanic's Assistant: Are you fixing your Grand Marquis yourself? What have you tried so far?

I took it to a shop and they say two of my core packs was bad so they change it and it did good now it started doing the same thing again

Submitted: 4 months ago.Category: Mercury
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Answered in 2 minutes by:
3/7/2018
Mercury Mechanic: Dan, Technician replied 4 months ago
Dan
Dan, Technician
Category: Mercury
Satisfied Customers: 25,969
Experience: Independent Shop Experience, 2 Year Automotive Diploma, & Access to Information Database
Verified
You probably have more coil packs fsiking. You will wanna start by checking diagnostic codes to see what cylinder is misfiring then swap that coil with another cylinder to see if misfire follows coil if so this proves coil is the problem and needs to be replaced. My goal is to provide 5 star service so please let me know if you have any questions. Thanks
Ask Your Own Mercury Question
Mercury Mechanic: Dan, Technician replied 4 months ago

E​ver get problem figured out? Please do not forget to rate answer, thanks.

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Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

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